Air and gas pump.



R. A. BEMIS.

AIR AND GAS PUMP. APPLICATION FILED IIIIIE 20.19I7.

Patented Sept. 10, 1918.

2 SHEETS-SHEET l.

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R. A. BEMIS.

AIR AND GAS PUMP. APPLlATxoN F|`LED1UNE20.1911.

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2 SHEETS-SHEET 2.

g l' l WIT/VESSES Patented Sept. l0, 1918.

Menem) A. BEivrIs, oF SAN BERNnnnIivo, cALriionivrn;

AIR AND GAS PUMP.

Specification of Letters Patent.

patente@ Sert!- 10, 191186 Application lei Junes20, 1917. Serial N9. 1"?`5,;'799=.l

To cil-,whom t may concern:

Beit known that '1, RIQHARDAf BEMIS, a citizen of theUn'itedy States, and resident of Bernardino', in theI countylof San' Bernardino and State o-f California, have geometric forins, forms f revolution,` and with arotary piston inthe casing having aV pluralityl offbiades arrangedin pairs and so fpivoted on Iaxes radial with respect to thev centerof the piston as to swing toward arid, foiilY each ether andA Wipe against the side'v Walls of the casing as Well"as filling the entire j space radiallyv between the cen4` tleLof. the Casing and therrphemlwallf With thefforegoing and otherl objects in view Ytlie'inventio'n consists in ythe arrangement and combinationof parts hereinafter desebed and' Claimed, and While the/invention'is Inotrestricted.to the exact details of construction disclosedjor suggested herein, still yforthe purpose of villustrating a practical embodiment thereof reference is 'had to the accompanyingdrawings, in which like reference chara'etersYy designate the saine para in asevera views, ad in which 4"Figure 1fi's an lelevationy showing a side vievv 'of the piston in'` place Within the casing and'vvith the greaterportion of the section: f the'casin'g adjacent to the observer brokenavv'ay.A

Fig. 2` is aV vertical` longitudinal section Witlrrespect'to the axis of the piston on the une :2-2 einig. 1,

Fig.' 3 is a plan View of the device with the top portion of the casing broken away to disclose the piston Within and lthe relaticn of the Wingstofth'e 'side Walls of the casing. A'

Eig; Y4f is a plan view of the,r piston inprovidea vcasing of peculiar constructiony havlng internal Walls consisting of regular dicating the upper pair of Wings inf nested Eig. iisV a perspective; vieW ofthe piston; thevvings being indicated in the'sarne position'as iii Fig, 1. i

` Referring n'ovvA more particularly to the drawings I show a casing'l() comprisirigtWO substantially similarA sections ll'and 1'2'each having a base member 13 and ahub mein-' ber 14, the base'members'being 'sofarranged as to provide'or typify' any suitable means for supporting the casing, and thehub meinbers are arranged;with'` their axes in alinement with; each other and yparallel to tlie base. Except as thus f ar notedy the exterior of the'casing is of minor` consequence except that the two sections thereof are provided Withv suitable means such` as fia'nges 15 and separable'fasteners 16 t secure the same-together. The interior of the casing,` however, is to bevmore carefully noted; At the center of the casing the vvalll and hub portions arecounterbored formingl spherical cavities 17 both of the same size and as though formedI with a common center atV 18 Whichniayy be regardedas the factual center of the entire pump The side Wall 19'of each section of the casing is ofy precise conical forni the apex of the cone being at the center 18,v but Withtheheavy dotted line 20 representing the altitude ofthe cone at an oblique 'angle to the axis yof the shaft 21 journaled inthe hubs 14 and hence oblique to the `1ned'ian central plane ofthe piston WhichI is perpendicular to said axis of the shaft. In'v other Words each side Wall 19Y ofthe casing sectionsmay be properly de-` scribed as a geometric figure of revolution around the imaginary axis 20.

` The peripheral Wall22 Lof each casing sectionis at every point equally distant from thecenter 18 of the device and hence isa portion ofl a true geometric sphere and -obvif ouslyl saidl peripheral Wall is parallel tothe spherical socket 17of the -same section. V The piston, indicated'- as a Whole lat 23 comprises a1's} hericall hub 24k journaled in the sockets ,17, of the casing.A TheY piston lalso includes what may be termed a solidor secured rigidly upon or formed integral with the spherical hub 24 and arranged in the same general plane and on diametrically opposite sides of said sphere. Each disk member 25 is bounded remote from the hub 24 with a periphery 26 conforming to the peripheral walls of the casing and hence of a spherical form. The advancing radial edge or end 27 of the disk member 25 may be fiat and described as'bounded by two elements radiating from the center 18K. The spherical extent of each member 25 is shown as less than 180 degrees, providing a space 28 for the wings tobe described below. Considering the disk as a `whole therefore and disregarding for the moment the spaces 28, it may be described as a slice from the center of the sphere and bounded on opposite sides with two conical surfaces whose apexes coincide at the center of the sphere. It will thus be seen that the neck portion 29 uniting the disk members to the spherical hub 24 is materially thinner than the periphery of the piston.

In each space 28 I provide a pair of wings 30 each of which is pivoted on` an axis radial with respect to the center 18 along one edge of the advancing end 27 of the disk member'25, the axis of each wing being indicated at 31.- The inner and outer ends 32 and 33 of each wing conform precisely to the spherical surfaces adjacent to which they are located and over which they glide with a fluid tightv connection while the wing swings around its own axis. The advancing or free edge 34 of each wing is conical and conforms to the conical surface '35 formed at the rear end or edge of the disk member 25 ahead of the same and over which said edge 3,4 of the wing sweeps with a fairly tightcontact. The coperating surfaces 34 and 35 are portions of a true geometric cone whose altitude is the axis of the wing. Any suitable mechanical means may be provided to effect the pivotal connection of the several wings to thefadvancing edges or ends 27 of the disk members 25 and likewise if desired suitable means such as springs 36 of any suitable nature may be arranged to tend to force the wings apart or to wipe along the lateral wallsr 19 of the casing.

Any suitable means indicated for example as a pulley 37 connected to the shaft 21, may be provided to rotate the piston at high speed. 38 and 39 represent respectively inlet and outlet means to and from the interior l of the casing between the walls 19 thereof,

`saine as the cross section of 4the narrowest` space between the lateral walls of the `cas` The axis of the driving shaft being,l inclined with respect to the axes of the lateral walls of the casing or the altitudesof.. the cones corresponding to such walls, theing.

spherical hub 24 serves toinsure a suitable joint between the separable part of the disk or piston and the casing walls. l

I claim:

l. In a rotary pump, the combination of Y a casing, a piston journaled for rotation therein and means to rotate the piston, said casing comprising a peripheral wall const1 tutiiig a portion vof a geometric sphere and a side wall of conical form, the apex of which coincides with'the center ofthe pis'-V ton, and said piston comprising a disk portion the periphery of which conforms to the peripheral wall of the casing, and also a wing pivoted upon the disk portiony for movement around an axis radial with respect to the center Aof the piston and adapt? ed to glide along said conical lateral wall,v

the piston and opposite lateral wall of the casing being so constructed as to coperate with said wing to compress and'force the fluid from the casing. f

2. In a rotary pump, the combination of 'a casing, a piston journaled for Arotation therein and a shaft journaled in the casing to which said piston is connected, vsaidcasing` comprising a peripheral wall constituting a portion of a geometric sphere 'whose center coincides with the center of the piston and the lateral walls of the casing bearing similar cones whose apexes coincide with the said center, but whose altitudes are similarly oblique to the axis of the piston, and said piston comprising a diskl portion fitted slidably between those portions ofthe lateral walls of the casing that are nearest to each other and movable freely through those portions of the casing` where the side walls are remote from the disk, the periphery of the disk conforming to the curvature of the peripheral wall ofy the casing, said disk having a circumferential opening, and a pair of wings pivoted upon the radialwall ofv said opening and movable laterally toward and from eachother around axes that i 'are radial with respect to the center of the piston, the lateral edges of the Wings being adapted to Wipe continually over the said conical lateral Walls of the casing.

ll@ cide with said center but having their altitudes oblique to each other, a piston comprising a spherical hub journaled in said cavities, said piston also including pairs of radial Wings movable laterally toward and from each other and wiping over said casing Walls, and means including a shaft journaled in said casing and connected diametrically With said spherical hub to rotate the piston.

RICHARD A. BEMIS.

Copies of this patent may be obtained for've cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

